Do-it-Yourself Kits for Physics Investigatory Projects

For 12th science students.

1 Kirchhoff Laws and Ohm’s Law

1.Kirchhoff’s Voltage Law: Verification of Kirchhoff’s Voltage La w in a series combination of LEDs.2.Kirchhoff’s Current Law: Verification of Kirchhoff’s Current La w in a parallel combination of LEDs. 3.Ohm’s Law: Verification of Ohm’s Law in a circuit.

CJKLOL-001

2 Variable Resistors: Potentiometer, Preset and LDR

1.

Potentiometer as Variable Resistor: Using a potentiometer as a variable resistor; verify the varying current using a multimeter.

2.

Preset as Variable Resistor: Using a preset as a variable resistor; verify the varying current using a multimeter.

3.

LDR as Variable Resistor: Using an LDR to vary the intensity of an LED; verify the varying resistance and current using a multimeter.

4.

Potentiometer as Voltage Divider: Using a potentiometer as a voltage divider; verify the varying voltage using a multimeter. Implementation of conc ept in ‘Sequential glow of LEDs at different voltages’

5. Alternate Glowing of LEDs Using a Preset: Alternate glowing of LEDs using a preset and depicting the internal structure of a preset (or potentiometer).

CJVR-002

3 Capacitors 1.

Charging the Capacitor with a Resistor: Charging different capacitors with resistors and time constant calculations during charging; Three different cases: 1000 ìf + 1 k? , 100 ìf + 10 k? , 100 ìf + 330 ? .

2.

Discharging the Capacitor with a Resistor: Discharging different capacitors with resistors and time constant calculations during discharging; Three different cases: 1000 ì f + 1 k? , 100 ìf + 10 k? , 100 ìf + 330 ? .

CJC-003

4 Relay and Electromagnetism

1. Burglar Alarm: Burglar Alarm using a relay with modification and concept of Feedback.2. Alternate Switching of LEDs Using a Relay: Application of relay as a switch. 3. Relay as an Oscillator

CJRL-004

5 Diode 1.

To Learn How a Diode Works: Diode as a switch; its functioning in forward bias and reverse bias modes; verifying biasing condition using a multimeter.

2. Low Resistance Path Using a Diode: Current following a minimum resistance path through the diode, when it is forward biased.

3. Protecting a Circuit Using a Diode: application of diode as protection device.

CJD-005

6 Digital Logic Gates-1:

OR and AND (using diodes)

1. OR Gate Using Diodes: Realizing the truth table of a 2-input OR gate, and analyzing the path of the current in four cases.

2. AND Gate Using Diodes: Realizing the truth table of a 2-input AND gate, and analyzing the path of the current in four cases.

CJDLG1-006

7 Digital Logic Gates-2: NOR and NAND (using diodes)

1. NOR Gate Using Diodes: Realizing the truth table of a 2-input NOR gate, and analyzing the path of current in four cases.

2. N AND Gate Using Diodes: Realizing the truth table of a 2-input NAND gate, and analyzing the path of the current in four cases.

CJDLG2--007

8 Zener Diode 1. To Learn How a Zener Diode Works: Functioning of zener diode in forward and reverse bias modes; verifying reverse breakdown voltage using a multimeter.

2. Zener diode as Voltage Regulator.

CJZD-008

9 Transistors Transistor as Amplifier and Switch: Demonstrating the cut-off, active and saturation regions, identifying the biasing conditions for all the three regions and experimental calculation of beta in active and saturation regions.

*This pack also contains the following experiments: Identifying the type of BJT transistor using a multimeter, Measuring the gain of a transistor and demonstrating B-E Junction as diode in a transistor.

CJTR-009

SR. No. DIY KITs List of Experiments Product Code

Shop Online: E www.cooljunk.in/physics-projects-kits : info@cooljunk.in R. Ganesan: Gurpawan Mand: Vaibhav Sharma 9560333610 9818905882 : 9899200312

Do-it-Yourself Kits for Physics Investigatory Projects

For 12th science students.

SR. No. DIY KITs List of Experiments Product Code

18 DC Motor: Relationship between RPM & Voltage

Controlling Speed of DC Motor: Demonstrating factors affecting the speed of DC motor; establishing relationship between RPM and voltage.

CJDCM-018

19 Wheatstone Bridge* Wheatstone Bridge: Verifying the wheatstone bridge principal and experimental calculation of unknown resistor value using a potentiometer.

CJWSB-019

20 Diode Application-1* Bridge Rectifier: Realizing the full-wave rectifier using a combination of diodes and a 12 V AC step-down transformer; verifying the rectified output DC voltage using a multimeter.

CJDA1-020

21 Diode Application-2* Full-wave Rectifier Using a Center-tap Transformer: Realizing the full-wave rectifier using a combination of diodes and a 12 V AC center=tap transformer; verifying the rectified output DC

voltage using a multimeter.

CJDA2-021

22 Joule Thief* Joule Thief (DC Boost Converter): Drawing energy from a dead cell using a series LCR Circuit . CJTRA7-022

23 Infra-red Application-1*

Security Alarm System using an IR Sensor: Building transmitter and receiver circuits using an IR LED and a photodiode; triggering and giving feedback to relay for continuous beeping of alarm in case of any obstacle detection.

CJIRA1-023

24 Temperature Sensor* Temperature Sensor: Demonstration of temperature controlled sw itch using voltage divider circuit and thermistor.

CJTS-024

13 Digital Logic Gates-3: OR and AND (using transistors)

1. OR Gate Using Transistors: Realizing the truth table of a 2-input OR gate, and analyzing the path of the current in four cases.

2. AND Gate Using Transistors: Realizing the truth table of a 2-input AND gate, and analyzing the path of the current in four cases.

CJDLG3-013

14 Digital Logic Gates-4: NOR and NAND (using transistors)

1. NOR Gate Using Transistors: Realizing the truth table of a 2-input NOR gate, and analyzing the path of current in four cases.

2. N AND Gate Using Transistors: Realizing the truth table of a 2-input NAND gate, and analyzing the path of the current in four cases.

CJDLG4-014

15 Transistor Application-

4: Inverter (NOT Gate)

Transistor as an Inverter: Realizing the truth table of NOT gate and analyzing the path of the current in two cases; low and high inputs.

CJTRA4-015

16 Transistor Application-5: LED Flasher

Transistor as Blinker (LED Flasher): Demonstrating the concept of Tunnelling using a transistor and learn about Esaki diode.

CJTRA5-016

17 Transistor Application-

6: H-Bridge

H-Bridge: Motor-driving circuit used in robotics to control the director of rotation of motors. CJTRA6-017

10 Transistor Application-1: Touch Activated Switch

Touch Activated Switch Using a Transistor: Application of transistor as a switch and verifying the biasing conditions of ‘transistor in saturation region’.

CJTRA1-010

2: Darlington Pair:11 Transistor Application-

Darlington Pair Cascading two transistors for multistage amplification. CJTRA2-011

12 Transistor Application-

3: Automatic Night Lamp

Automatic Night Lamp: Application of Transistor as an automatic switch CJTRA3-012

Shop Online: E www.cooljunk.in/physics-projects-kits : info@cooljunk.in R. Ganesan: Gurpawan Mand: Vaibhav Sharma 9560333610 9818905882 : 9899200312